In the Hesiodic fable, Cronus separates the heavenly pair by mutilating his oppressive father Uranus.
Earth excited Cronus to attack the father, whom he castrated with a sickle.
Other tales said the stone was the one given by Rhea to Cronus as a substitute for Zeus.
DEMETER, in Greek mythology, daughter of Cronus and Rhea and sister of Zeus, goddess of agriculture and civilized life.
He is acquainted with the existence of an older dynasty now deposed, the dynasty of Cronus and the Titans.
In Greek mythology the term was specially applied to the stone supposed to have been swallowed by Cronus (who feared misfortune from his own children) in mistake for his infant son Zeus, for whom it had been substituted by Uranus and Gaea, his wife's parents (Etymologicum Magnum, s.v.).
URANUS (Heaven), in Greek mythology, the husband of Gaea (Earth), and father of Cronus (Saturn) and other deities.
The gods assume animal forms: Cronus becomes a horse, Rhea a mare; Zeus begets separate families of men in the shape of a bull, an ant, a serpent, a swan.
Myth comes in when the Maoris represent Rangi and Papa, Heaven and Earth, as two vast beings, male and female, united in a secular embrace, and finally severed by their children, among whom Tane Mahuta takes the part of Cronus in the Greek myth.
Zeus grew up, administered an emetic to Cronus (some say Metis did this), and had the satisfaction of seeing all his brothers and sisters disgorged alive.